Stress breaker



M %M Y Apr-i110, 192& 1,665,975

" N. A. OSCHER STRESS BREAKER Filed March 12. 1926 TEN}.

WITNESSES 6 INVENTOR "Imam" 06th ATTORNEYS Patented A r. 10,!19Z8Q enlarger: A. osc'nna', or 3300mm; rosin a J I I T his I invention relates to stress breakers and more partlcularlyt-o a stress breaker or stress'elnninator, which is adapted for use in connection with partial dentures, an object of theinventio'n being to provide a coupling device of th s nature which connects a tooth engaging member with the artificial denture and which compensates for the naturalmovement'of the teeth:

I am aware of course that devices of a similar nature havebeen devised which per mitdateral movement and vertical adjustment, butmy improvedcoupling'in addition 7 "to these Operations has in a very real sense a ball and socket connection which permits of a' turning or partial rotary movement of I a tooth, which 1s the naturalinovement, and

I am enabled to vary this. movement by adjustment after the denture is completed. T

A further object is to provide a stress breaker which is capable ofadjustment to give the desired'pressure, on the gums or membranes and whichcan be'nicely adjusted i afterjshrinkage of the gums by the einploy- 2 my improved device is 'adatped for use-in v; connection with any form of'partial denture, Hand I do not wish to'limitjmyself in any sense to any particular form of partial den Y ture but desire to cover the device-per se .35

for any use' to which it canbef'put. V A further important object of'my inve'n-' 'ti'on is to'provide'a device of the character stated which will be entirely sanitary,which can be readily cleaned so that food particles can be easily removed, and which may be fixed to and constitute a part of a denture,

' and which will most efliciently perform the With these andotherfobjectsin' view, my

' invention consists incertain novel features functions for which it is intended,

- of construction and combinations and arrangements of parts, which will be more fullyhereinafter describedand pointed out 1 in the claims.

I illustrate in the accompanying drawings my invention as applied to one type; of partial denture, and insaid drawings v Figure 1 is a plan view, showing my de- "vice in operative position;

Figure 2 is a plan view of the dentur 1 moved from th j a clamp foriengaging a good Figure?) isan enlarged fra gmentary plan view oft-he partial denture shown in Figure 2;- i i 1 i y Figure-4 is a fragmentary view in'section on the line 4& of Figurej3,' V

Figure '5 'is a view in transverse h section on the line 5.5--of Figure't; Figures 6, 7, 8 and9 are detail views'illusf trati'n'g .fourparts which go to make up my 'improvedstress breaker; 1 1

- Figure 10i'sa perspective'view, illustrat Sing amodification.

I have 'yselected for denture"in which two artificial molars 1 and illustration a partial rizontal 2 are secured to a baseB whiCh may off metal or. any other sultablematerlalyand wh ch is lured to a bare'havinga c-lamp at one end "to clamp around a good tooth of the j aw. This form of denture is for illustrationonly as it is obvious thatmyj device partial denture.

may be used in-connection with' any form'or" 1 1 Firstg I shall describe the construction I i mechanically of my impr'oved device, and t-henpoint out itsyuse and operation." a My improved device comprises four sepa rate and distinct parts, nainely,a screw 6, I

sleever7, a nut 8, and a"tubular socket member, 9, the latter being internally screw" threaded lower end.

threaded to receive of the screw 6. v, -.The sleeve=7 has-a bore :10 therein larger in diameterthan'thediameter of the screw 6, and the upper end of said'sleeve7 is recessed to form a socket 11. to receive the f semi-spherical head 120i the upperxendof' the screw Gand give a balland socketuconnection between the sleeve and thescrewr The head "12 has a screw driven receiving groove13 thereinso that it maybe adjusted for a purpose which will hereinafter'appear. .The nut 8 is-pre'ferably in'the formof a metal ring having internal threads and adapted/to beadjusted toward and away from thelower-end ofthe sleeve 7 to. give the desired,"freedonl of movement between the screw and the: sleeve; v. The tubular socket member closed at its lower end, as shown at Figure 4., so as to prevent the entrance of foodpar- 5 ticles therein. U The sleeve 7 carries a clamp 1 4, preferably of the three-prong type, illustrated to. remov 4 I ably engagea good tooth 15 in theljaw, and

while Ishall referto this part le as a clamp 1 lwould-havejit distinctly understood-that 5 base in any approved manner.

. the sleeve may be fixed to any part or mem-v wish to be limited to any particular form of clamp or other means for the purpose.

The tubular socket member'9 is soldered or otherwise secured to the base 3 of the denture, and the artificial molar 2 is cut out or grooved in its forward face to accommodate the socket member and also to'accommodate the other parts of my improved device so as to allow the artificial teeth'to fit closeto the ,good tooth and prevent any undue space between. With my improved device it is necessary to remove but a relatively small portion of the artificial tooth as compared with other devices of which I am aware. Hence, I have been able toprovide very strong and durable artificial teeth without the weakening of the same to accommodate a coupling device.

If a socket member is to be secured to a rubber or other analogous base, I may use an anchoring strip 16 fixed to the socket member 9, as illustrated in the modification shown in Figure 10. This anchoring strip 16 can be molded or otherwise formed in the I shall not attempt to set forth in detail the exact manner of carrying out the construction of a denture with my improved device, as this is capable of modification, but I would have it understoodthat the socket member 9 is secured properly to the base 3 and ample accommodation provided for the nut 8 and sleeve 7 above the same with the screw 6 in place, the, entire assemblageap- 1 pearing as shown in Figure 4.

WVhen the parts are thus assembled and there is a shrinkage of the gums it is'simply necessary for the dentist to adjust thescrew 6 longitudinally in the tubular socket member9, and'this can be done by the employment of a screw driver imparting turning movement to .the screw. When the parts are coupled, the ball and socket jointbetween the head 12 and thesleeve 7 allow for lateral tilting or pivotal movement; the position of the nut 8 allows for the desired vertical movement of the sleeve relative to the screw and vice versa; and the mounting as a whole permits of a turning or pivotal movement so that the joint is in a very real sense a universal joint which prevents undue strain upon the good tooth due to the action of the jaws in performing their natural functions of mastication.

to cover broadly in this'patent, and I do not wish to restrict myself to anyv particular partial denture, to any particular means for assemblage of the parts, nor to any unnecessary adjuncts or features which co-operate therewith, but desire to cover broadly the device. which consists of the screw, the sleeve, the socket member, and the nut-arranged substantially as set forth and designed for the purpose intended. Hence, various slight changes and alterations might be made in the general form of the parts described without departing from my invention and, therefore, I do not limit myself to the precise details set, forth but consider myself at liberty to make'such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. A device of the character described, including a sleeve, a screw having a ball and socket connection with the sleeve, a threaded socket member adapted to be connected to a partial denture and receive the screw, said sleeve adapted to support a tooth engaging member, and a nut on the screw placed gingivally of the sleeveadapted to adjust the engagement between the'screw and the sleeve.

'2. A device of the character described, ineluding a sleeve adapted to be secured to a tooth engaging member, said'sleeve having a bore therethrough and a socket therein, an

internally screw-threaded socket member adapted to be fined to a partial denture, a screw projected through the bore of the sleeve and having a head fitting thesocket, said head having a screwdriver receiving groove in its outer end, anda n'ut adjustable on the screw on the gingival side of the sleeve. I

3. The combination with a partial denture of an internally screw-threaded socket member having a closed end and fixed to the base ofthe partial denture, a tooth of said partial denture being grooved to accommodatethe socket member, a tooth engaging clamp, a sleeve fixed to the clamp, a screw projected through the sleeve and adjustable in the socket member, said screw having a ball and socket juncture with the sleeve, and a nut on the screw on the gingivalside of the sleeve adapted to vary the engagement of-the screw and the sleeve. 

